do(实意)+do(助动词)=be doing?

题目

do(实意)+do(助动词)=be doing?
1.What do you promise等於What are you prominsing?
2.What do you promise等於What were you prominsing?

答案

理解错误
这两句之间是时态的不同
do(实意)+do(助动词)=be doing这个等式不存在
从没听过